Experimental study on the unconfined compression strength of cemented soil contaminated by industrial wastewater

摘要

Contamination can change the physical properties of soil, reduce the strength of cemented soil foundation, and then induce the instability or disruption of buildings. This study explored the relationships among the age, electrical resistivity, unconfined compression strength, contamination of wastewater concentration. Firstly, we mixed the silty clay with industrial wastewater of three different concentrations to form the contaminated soil. Then, mixed the contaminated soil with ordinary portland cement to form the cemented soil blocks. Finally, measured the unconfined compression strength and electrical resistivity of these blocks. The results show that the unconfined compression strength and electrical resistivity increase linearly with the increase of the logarithm of age, and decrease exponentially with the increase of wastewater concentration. The unconfined compression strength of cemented soil has a linear relationship with its resistivity. The industrial wastewater concentration and age can be used to predict the unconfined compression strength of cemented soil.The predict values correlate well with the experimental values.